Mitsubishi Electric TRANE NTXAMT12A112AA Manuel D'installation page 39

IMPORTANT
Attach shielding ground on the outdoor unit's ground terminal.
If the remote controller cable exceeds 10 m [32 ft.], use a 1.25 mm
and add that exceeded position to within 200 m [656 ft].
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Specifications are subject to change without notice.
NTXAMT12, 18, 24, 30, 36A112AA
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[AWG16] diameter cable over the exceeded portion,
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39 © 2018 Mitsubishi Electric Trane HVAC US LLC. All rights reserved.
① CONTROL BOARD
② INVERTER BOARD
③ TO REMOTE CONTROLLER I , 2
④ GROUNDING TERMINAL
⑤ SI, S2, S3